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Method for determining longitudinal mechanical response of buried pipeline caused by uneven stratum settlement

A buried pipeline, mechanical response technology, applied in special data processing applications, instruments, calculations, etc., can solve problems such as pipeline detachment, partial suspension, partial contact, etc.

Active Publication Date: 2019-11-15
FUJIAN UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] However, studies have shown that the characteristics of the pipe-soil interaction are related to the cumulative settlement of the strata where the pipe is located. When the soil around the buried pipe undergoes a large deformation, affected by the pipe-soil deformation stiffness, the settlement value of the pipe is less than that around the pipe. Soil, the pipeline in the subsidence area of ​​the ground will be separated from the surrounding soil, that is, there will be partial suspension and partial contact. The elastic foundation model with complete contact does not conform to the actual deformation of the soil around the pipe, and cannot reflect the actual force of the buried pipeline. and deformation

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  • Method for determining longitudinal mechanical response of buried pipeline caused by uneven stratum settlement
  • Method for determining longitudinal mechanical response of buried pipeline caused by uneven stratum settlement
  • Method for determining longitudinal mechanical response of buried pipeline caused by uneven stratum settlement

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[0059] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0060] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0061] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combina...

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Abstract

The invention relates to a method for determining longitudinal mechanical response of a buried pipeline caused by uneven stratum settlement. The method includes: firstly, determining the bending rigidity and the foundation elastic coefficient of a pipeline longitudinal elastic foundation beam model; drawing the cumulative settlement value of the stratum where the pipeline is located in a coordinate system; fitting curves, then determining a calculation model of longitudinal mechanical response of the buried pipeline caused by uneven stratum settlement; sequentially determining the bending moment and the shearing force of the pipeline section at the sections of the suspended section and the grounding section; and finally, carrying out Fourier cosine series expansion on a stratum cumulativesettlement item, and utilizing the Fourier series expansion of the stratum settlement item and the corresponding Fourier coefficient to determine the bending moment, the shearing force and the settlement of any section of the suspended section and the grounding section respectively. According to the method, the longitudinal mechanical response value of the buried pipeline under the influence of uneven stratum settlement can be determined more accurately, and a basis is provided for longitudinal design of the pipeline.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a method for determining the longitudinal mechanical response of buried pipelines caused by uneven ground settlement. Background technique [0002] Buried pipelines are an important part of the infrastructure for transporting natural gas and crude oil, and play a pivotal role in social production and life. They are called "lifeline projects". There are more and more ground subsidence problems induced by subway tunnel construction, excessive pumping of groundwater, and mining of underground mineral deposits, which pose a serious threat to the long-term safe operation of buried pipelines. [0003] The European Gas Pipeline Incident Data Group (EGIG) has made statistics on natural gas pipeline accidents in European countries from 1970 to 2010, among which the proportion of natural gas pipeline accidents caused by surface movement reached 7.4%. The subsidence of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 张丙强陈福全王启云罗才松姚志雄
Owner FUJIAN UNIV OF TECH
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